1、 Choose appropriate equipment and molds

High precision equipment:

Select a stamping and slitting machine with high-precision positioning systems (such as visual positioning and laser positioning) to ensure that the cutting path is accurately aligned with the preset dividing lines of the circuit board (such as V-Cut slots and stamp holes), avoiding component damage or cutting edge burrs caused by offset.

Customized molds:

Customize specialized molds based on the shape, thickness, and component layout of the circuit board to ensure that the mold edges match the cutting path perfectly. The material of the mold should be alloy steel with high hardness and strong wear resistance to reduce wear and deformation during long-term use.

Low stress mold design:

Optimize the mold structure and adopt a gradient stamping blade design to reduce stress concentration during stamping and minimize impact on the circuit board. For ultra-thin or flexible circuit boards, milling cutters or laser cutting machines can be used instead of traditional stamping to further reduce stress damage.

2、 Optimize process parameters

Control stamping pressure:

Adjust the stamping pressure according to the material and thickness of the circuit board to avoid excessive pressure causing deformation of the board or detachment of components. The optimal pressure range can be determined through experiments, and a pressure monitoring system can be installed in the equipment to provide real-time feedback on pressure values.

Adjust stamping speed:

Reduce the stamping speed appropriately, extend the stamping time, evenly distribute the pressure, and reduce the instantaneous impact force. For high-density component circuit boards, segmented stamping technology can be used, with light pressure positioning followed by gradual pressure cutting.

Optimize mold clearance:

Reasonably set the gap between the upper and lower molds of the mold to avoid excessive friction caused by too small a gap or incomplete cutting caused by too large a gap. The gap value is usually 5% -10% of the thickness of the circuit board and needs to be adjusted according to the actual material characteristics.

3、 Standardize operational procedures

Accurate positioning and fixation:

Before stamping, use positioning pins or visual positioning systems to ensure the accurate position of the circuit board, and firmly fix the board through a pressing mechanism (such as elastic pressure blocks) to prevent displacement or vibration during the stamping process.

Staged stamping:

For complex shaped or high-density component circuit boards, a staged stamping process can be used: first stamping the edges or non component areas, and then gradually pushing towards the central area to disperse stress and reduce the impact on key components.

Control environmental factors:

Maintain stable temperature and humidity in the work environment to avoid deformation of the circuit board or thermal expansion and contraction of the mold due to environmental changes, which may affect accuracy. At the same time, reduce vibration and dust in the workshop to prevent impurities from entering the mold gaps.

4、 Strengthen equipment maintenance and upkeep

Regular cleaning of molds:

Clean the residue and oil stains on the surface of the mold after each use to prevent impurities from accumulating and causing poor cutting or scratching the circuit board. Special cleaning agents and soft bristled brushes can be used for cleaning to avoid scratching the surface of the mold with hard objects.

Check for mold wear:

Regularly inspect the wear of the mold blade and replace severely worn molds or perform grinding treatment in a timely manner. Worn molds can lead to increased burrs on the cutting edges, increasing the risk of damage to the circuit board.

Lubrication and maintenance:

Regularly lubricate the transmission components of the equipment, such as guide rails and lead screws, to reduce friction and wear and ensure smooth operation of the equipment. At the same time, check the sealing of the cylinder or servo motor to prevent air or oil leakage from affecting the stamping accuracy.